what could happen with a P91 pipe and welds on service without PWHT 3

[Eduardo1982]

Dear guys.
I know it is a crazy question, but what could happens with a P91 pipe and welds on steam service what is working under pressure and without PWHT? Even if it is a temporal pipe (and probably it can be used for a couple of weeks on use) are there any "method" to follow to assure that those welds can work without damage or rupture?
My apologies if this forum is not the correct one for my crazy question.

 

[EdStainless]

In a strange way this research may find a new use.
With more effort going into waste reduction and resource recovery there are plants that do waste-to-energy and also try to recover useful components of the residue.
Face it, this plant would not need to generate any net power, but it could use every bit generated for carbon capture and metals reclamation.
I am sure that there will be other wild high temp schemes out there as well.

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P.E. Metallurgy, consulting work welcomed

 

[XL83NL]

Couldn’t agree more. That’s exactly the scope of work of my employer; new, emerging technologies. Although the pressure/temperature combinations we see don’t match those of (A)USC units, temperature and other challenges (corrosion) are definitely in the same range and even much further.

Huub
- You never get what you expect, you only get what you inspect.

 

MJ,

How much has the US gov't spent on research for coal gasification and syngas in five decades? It was the Next Big Thing back in the day.

Trying to turn a sow's ear into a silk purse is hard ...

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[EdStainless]

A process to make hydrogen from coal and leave the C solid has some potential.
Everything gets recycled.

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P.E. Metallurgy, consulting work welcomed

 

[MJCronin]

A really fun video about the practical difficulties of P91 material repair can be found here.

This relates to HRSGS in America's ever growing stable of Combined Cycle Power Plants ... not coal plants

https://youtu.be/vQowJOXZ5C4

( Yes, I know that the speaker drones on and on..)

MJCronin
Sr. Process Engineer